Things are working!

.gitignore

@@ -2,5 +2,6 @@
 *.shsh2
 iP*/
 tmp/
-tools/
 BuildManifest.plist
+tools/futurerestore*
+tools/tsschecker*

README.md

@@ -1,4 +1,33 @@
 # 841-OTA-Downgrader
- Downgrade almost any 32-bit device to iOS 8.4.1
+ Script that can be used to downgrade almost any 32-bit device to iOS 8.4.1
+
+### Tools used by this script:
+- cURL
+- partialZipBrowser
+- tsschecker
+- bsdiff (bspatch)
+- kloader
+- futurerestore
+
+### Tested on:
+- iPad3,3
+
+### Supported devices:
+- iPad2,1
+- iPad2,2
+- iPad2,3
+- iPad2,4
+- iPad2,5
+- iPad2,6
+- iPad2,7
+- iPad3,1
+- iPad3,2
+- iPad3,3
+- iPad3,4
+- iPad3,5
+- iPad3,6
+- iPod5,1
+- iPhone4,1
+- iPhone5,1
+- iPhone5,2
 
-### WIP

restore.sh

@@ -53,10 +53,7 @@ key_n41=baf05fe0282f78c18c2e3842be4f9021919d586b55594281f5b5abd0f6e61495
 iv_n42=fdad2b7a35384fa2ffc7221213ca1082
 key_n42=74cd68729b800a20b1f8e8a3cb5517024a09f074eaa05b099db530fb5783275e
 
-rm -rf iP*/
-rm -rf tmp/
-rm -rf $(ls *.shsh2)
-rm -rf BuildManifest.plist
+rm -rf iP*/ tmp/ $(ls *.shsh2) BuildManifest.plist
 
 clear
 echo "******* 841-OTA-Downgrader *******"
@@ -93,35 +90,72 @@ then
     exit
 fi
 
-echo "Downloading tsschecker..."
 mkdir tmp
-curl -L -# "https://github.com/tihmstar/tsschecker/releases/download/v212/tsschecker_v212_mac_win_linux.zip" > "tmp/tsschecker.zip"
-echo "Extracting tsschecker..."
-unzip -j tmp/tsschecker.zip tsschecker_$platform -d tools/
-chmod +x tools/tsschecker_$platform
-echo
 
-echo "Downloading futurerestore..."
-curl -L -# "http://api.tihmstar.net/builds/futurerestore/futurerestore-latest.zip" > "tmp/futurerestore.zip"
-echo "Extracting futurerestore..."
-unzip -j tmp/futurerestore.zip futurerestore_$platform -d tools/
-chmod +x tools/futurerestore_$platform
-echo 
+if [ ! -e tools/tsschecker_$platform ]
+then
+    echo "Downloading tsschecker..."
+    curl -L -# "https://github.com/tihmstar/tsschecker/releases/download/v212/tsschecker_v212_mac_win_linux.zip" -o "tmp/tsschecker.zip"
+    echo "Extracting tsschecker..."
+    unzip -j tmp/tsschecker.zip tsschecker_$platform -d tools/
+    chmod +x tools/tsschecker_$platform
+    echo
+fi
+if [ ! -e tools/tsschecker_$platform ]
+then
+    echo "Download/extract tsschecker failed. Please run the script again"
+    exit
+fi
+
+if [ ! -e tools/futurerestore_$platform ]
+then
+    echo "Downloading futurerestore..."
+    curl -L -# "http://api.tihmstar.net/builds/futurerestore/futurerestore-latest.zip" -o "tmp/futurerestore.zip"
+    echo "Extracting futurerestore..."
+    unzip -j tmp/futurerestore.zip futurerestore_$platform -d tools/
+    chmod +x tools/futurerestore_$platform
+    echo 
+fi
+if [ ! -e tools/futurerestore_$platform ]
+then
+    echo "Download/extract futurerestore failed. Please run the script again"
+    exit
+fi
 
 echo "Downloading ota.json..."
-curl -L -# "https://api.ipsw.me/v2.1/ota.json/condensed" > "tmp/ota.json"
-echo "Copying ota.json to /tmp..."
-cp tmp/ota.json /tmp
+curl -L -# "https://api.ipsw.me/v2.1/ota.json/condensed" -o "tmp/ota.json"
+echo 'Copying ota.json to /tmp or $TMPDIR...'
+if [ $platform == macos ] 
+then
+    cp tmp/ota.json $TMPDIR
+else
+    cp tmp/ota.json /tmp
+fi
 echo
+if [ ! -e tmp/ota.json ]
+then
+    echo "Download ota.json failed. Please run the script again"
+    exit
+fi
 
 echo "Downloading BuildManifest.plist..."
 OTAFirmware=$(curl "https://api.ipsw.me/v4/ota/download/$ProductType/12H321?prerequisite=12H143" -s -L -I -o /dev/null -w '%{url_effective}')
 pzb -g AssetData/boot/BuildManifest.plist $OTAFirmware
 echo
+if [ ! -e BuildManifest.plist ]
+then
+    echo "Download BuildManifest.plist failed. Please run the script again"
+    exit
+fi
 
 echo "Saving 8.4.1 blobs with tsschecker..."
 env "LD_PRELOAD=libcurl.so.3" tools/tsschecker_$platform -d $ProductType -i 8.4.1 -o -s -e $UniqueChipID -m BuildManifest.plist
 echo
+if [ ! -e $(ls *.shsh2) ]
+then
+    echo "Saving 8.4.1 blobs failed. Please run the script again"
+    exit
+fi
 
 echo "Extracting 8.4.1 IPSW..."
 unzip -q ${IPSW}.ipsw -d $IPSW/
@@ -133,16 +167,17 @@ key=key_$HardwareModelLower
 echo "IV = ${!iv}"
 echo "Key = ${!key}"
 tools/xpwntool_$platform $IPSW/Firmware/dfu/$iBSS.dfu tmp/iBSS.dec -k ${!key} -iv ${!iv} -decrypt
+dd bs=64 skip=1 if=tmp/iBSS.dec of=tmp/iBSS.dec2
 echo
 
 echo "Patching iBSS..."
-bspatch tmp/iBSS.dec tmp/pwnediBSS patches/$iBSS.patch
+bspatch tmp/iBSS.dec2 tmp/pwnediBSS patches/$iBSS.patch
 echo
 
-if [ $(echo $version | cut -c 1) == 1 ]
+if [[ $(echo $ProductVersion | cut -c 1) == 1 ]]
 then
     kloader="kloader_hgsp"
-elif [ $(echo $version | cut -c 1) == 5 ]
+elif [[ $(echo $ProductVersion | cut -c 1) == 5 ]]
 then
     kloader="kloader5"
 else